GENSETS

TEN 1,250 KVA GENSETS INSTALLED AT A MAJOR POWERPLANT IN YEMEN

Ghaddar Machinery reports that ten 1,250 kVA diesel generators with Cummins engines and Leroy Somer alternators have been supplied to a major powerplant in Yemen as part of a 10MW project. The featured project consists of 10 units of Ghaddar Generators 1250 KVA powered by Cummins G-Drive engines KTA50-G3 and Leroy Somer Alternators LSA50.2M6 with synchronizing system.

Specifics of the generators

The Cummins G-Drive engines KTA50-G3 has an outstanding reputation for high performance power even under the harshest conditions. The latest KTA range is jacket water aftercooled design. Its inbuilt step timing control system ensures optimum engine timing at all combinations of load and ambient temperature, improving cold starting and reducing light load fuel consumption to greatly enhance engine efficiency. major features include: * Aftercooler: Large capacity aftercoolers are supplied with three different configuration types, which are dependent on the rating used: Jacket Water Aftercooled (JWAC), One Pump Two Loop (1P2L), or Two Pump Two Loop (2P2L). This provides cooler, denser intake air for more complete combustion and reduced engine stresses for longer life and low exhaust emissions. *Cooling System: The JWAC aftercoolers share cooling water with the high temperature jacket water cooling system. There are no separate aftercooler connections that the customer needs to make. The 1P2L aftercoolers utilize coolant drawn from the jacket water system, but operate at a lower temperature than the jacket water, due to a separate, lower temperature thermostat. Two water pumps employ separate impellers on a common shaft to deliver coolant to the two different systems. Similar to the 2P2L system, two different radiators are used to cool the engine jacket water and the aftercooler water. The 2P2L utilises two completely separate water pumps. The engine jacket pump is engine-mounted and is driven from the rear of the gear housing. The aftercooler water pump is customer selectable and can be provided mounted on the front of the gear cover. Cummins provides conventional water inlet and outlet connections for the jacket system. Aftercooler water pump inlet and aftercooler core outlet connections are provided for customer use and ease of plumbing on the aftercooler system. *Lubrication: A large capacity integral gear driven pump provides pressure lubrication to all bearings and provides supply for piston cooling. Cummins-supplied large capacity oil pans are recommended for Prime and Continuous Power applications. *Pistons: These are dual Ni-resist, aluminum alloy, ground and shaped to compensate for thermal expansion which assures a precise fit at all normal operating temperatures. Oil cooled for rapid heat dissipation. Two compression rings and one oil ring.The system uses an offset piston pin for reduced susceptibility to liner cavitation.

The alternators

The Nidec Leroy-Somer LSA 50.2 alternator has been designed to offer customers the best power generation performances, says the company. With its meticulous design and optimised architecture, the LSA 50.2 strikes the perfect balance between compactness, reliability, performance and longevity, says Nidec. The Nidec Leroy-Somer LSA 50.2 alternator meets all key international standards and regulations, including IEC 60034, NEMA MG 1.3233, ISO 8528-3, CSA C22.2 n°100-14 and UL 1446 (UL 1004 on request). It is also compliant with IEC 610006-2, IEC 61000-6-3, IEC 61000-6-4, VDE 0875G, VDE 0875N and EN 55011, group 1 class A for European zone. The Nidec Leroy-Somer LSA 50.2 alternator can be integrated in EC marked generator sets, and bears EC, EAC and CMIM markings. It is designed, manufactured and marketed in an ISO 9001 and ISO 14001 quality assurance environment.

www.ghaddar.com www.cummins.com acim.nidec.com